灼日之矢：掌心里攒出来的那一箭

fx-sungaze

function sunGaze:BeginCharge(caster)
    self._chgT = 0
    self._chgNeed = self._config.chargeTime
    caster:PlayAction(global.MMO.ANIM_SKILL)      -- 拉弓姿态
    self._core = CreateChargeCore(caster:GetPalmPos())
end

function sunGaze:Update(dt)
    if not self._chgT then return end
    self._chgT = math.min(self._chgNeed, self._chgT + dt)
    local p = self._chgT / self._chgNeed
    self._core:SetRadius(6 + p * 16)              -- 光核随进度扩张
    self._core:SetIntensity(p)
    self._core:Bind(caster:GetPalmPos())          -- 跟掌心走

    if p >= 1 then self:Release(p) end            -- 满蓄自动放
end

function sunGaze:Release(power)
    local arrow = CreateGlowArrow(caster:GetPalmPos())
    arrow:SetSpeed(self._config.baseSpeed * (0.7 + 0.3 * power))
    arrow:SetAimHeight(AIM_HEIGHT)                -- 矢线: 头胸高度
    arrow:OnPassThrough(function(target)          -- 贯穿回调
        target:OnHit(self._dmg * (0.6 + 0.4 * power))
        SpawnSunAfterglow(target:GetX() + 40, arrow:GetY())
    end)
    self._core:Remove()
    caster:PlayAction(global.MMO.ANIM_ATTACK)
end